发布时间:2025-01-30 03:33:25
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有限元材料库的参数为:45号钢密度7890kg/m3,泊松比0.269,杨氏模量209000GP.
买了一楼的房子有四户人家的客厅阳台外面有四五米的距离一排六个变电箱还没有交房怎么能处理
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